OpenSSL reports :

High: OCSP Status Request extension unbounded memory growth

SSL_peek() hang on empty record

SWEET32 Mitigation

OOB write in MDC2_Update()

Malformed SHA512 ticket DoS

OOB write in BN_bn2dec()

OOB read in TS_OBJ_print_bio()

Pointer arithmetic undefined behaviour

Constant time flag not preserved in DSA signing

DTLS buffered message DoS

DTLS replay protection DoS

Certificate message OOB reads

Excessive allocation of memory in tls_get_message_header()

Excessive allocation of memory in dtls1_preprocess_fragment()

NB: LibreSSL is only affected by CVE-2016-6304

The version of Arista Networks EOS running on the remote device is affected by multiple vulnerabilities in the included OpenSSL library :

  - An information disclosure vulnerability exists in the     dsa_sign_setup() function in dsa_ossl.c due to a failure     to properly ensure the use of constant-time operations.
    An unauthenticated, remote attacker can exploit this,     via a timing side-channel attack, to disclose DSA key     information. (CVE-2016-2178)

  - A vulnerability exists, known as SWEET32, in the 3DES     and Blowfish algorithms due to the use of weak 64-bit     block ciphers by default. A man-in-the-middle attacker     who has sufficient resources can exploit this     vulnerability, via a 'birthday' attack, to detect a     collision that leaks the XOR between the fixed secret     and a known plaintext, allowing the disclosure of the     secret text, such as secure HTTPS cookies, and possibly     resulting in the hijacking of an authenticated session.
    (CVE-2016-2183)

  - A flaw exists in the ssl_parse_clienthello_tlsext()     function in t1_lib.c due to improper handling of overly     large OCSP Status Request extensions from clients. An     unauthenticated, remote attacker can exploit this, via     large OCSP Status Request extensions, to exhaust memory     resources, resulting in a denial of service condition.
    (CVE-2016-6304)

Several vulnerabilities were discovered in OpenSSL :

CVE-2016-2177

Guido Vranken discovered that OpenSSL uses undefined pointer arithmetic. Additional information can be found at https://www.openssl.org/blog/blog/2016/06/27/undefined-pointer-arithme tic/

CVE-2016-2178

Cesar Pereida, Billy Brumley and Yuval Yarom discovered a timing leak in the DSA code.

CVE-2016-2179 / CVE-2016-2181

Quan Luo and the OCAP audit team discovered denial of service vulnerabilities in DTLS.

CVE-2016-2180 / CVE-2016-2182 / CVE-2016-6303

Shi Lei discovered an out-of-bounds memory read in TS_OBJ_print_bio() and an out-of-bounds write in BN_bn2dec() and MDC2_Update().

CVE-2016-2183

DES-based cipher suites are demoted from the HIGH group to MEDIUM as a mitigation for the SWEET32 attack.

CVE-2016-6302

Shi Lei discovered that the use of SHA512 in TLS session tickets is susceptible to denial of service.

CVE-2016-6304

Shi Lei discovered that excessively large OCSP status request may result in denial of service via memory exhaustion.

CVE-2016-6306

Shi Lei discovered that missing message length validation when parsing certificates may potentially result in denial of service.

For Debian 7 'Wheezy', these problems have been fixed in version 1.0.1t-1+deb7u1.

We recommend that you upgrade your openssl and libssl1.0.0 packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

An update for openssl is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library.

Security Fix(es) :

* A memory leak flaw was found in the way OpenSSL handled TLS status request extension data during session renegotiation. A remote attacker could cause a TLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory, if it enabled OCSP stapling support. (CVE-2016-6304)

* It was discovered that OpenSSL did not always use constant time operations when computing Digital Signature Algorithm (DSA) signatures. A local attacker could possibly use this flaw to obtain a private DSA key belonging to another user or service running on the same system. (CVE-2016-2178)

* It was discovered that the Datagram TLS (DTLS) implementation could fail to release memory in certain cases. A malicious DTLS client could cause a DTLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory. (CVE-2016-2179)

* A flaw was found in the Datagram TLS (DTLS) replay protection implementation in OpenSSL. A remote attacker could possibly use this flaw to make a DTLS server using OpenSSL to reject further packets sent from a DTLS client over an established DTLS connection.
(CVE-2016-2181)

* An out of bounds write flaw was discovered in the OpenSSL BN_bn2dec() function. An attacker able to make an application using OpenSSL to process a large BIGNUM could cause the application to crash or, possibly, execute arbitrary code. (CVE-2016-2182)

* A flaw was found in the DES/3DES cipher was used as part of the TLS/SSL protocol. A man-in-the-middle attacker could use this flaw to recover some plaintext data by capturing large amounts of encrypted traffic between TLS/ SSL server and client if the communication used a DES/3DES based ciphersuite. (CVE-2016-2183)

This update mitigates the CVE-2016-2183 issue by lowering priority of DES cipher suites so they are not preferred over cipher suites using AES. For compatibility reasons, DES cipher suites remain enabled by default and included in the set of cipher suites identified by the HIGH cipher string. Future updates may move them to MEDIUM or not enable them by default.

* An integer underflow flaw leading to a buffer over-read was found in the way OpenSSL parsed TLS session tickets. A remote attacker could use this flaw to crash a TLS server using OpenSSL if it used SHA-512 as HMAC for session tickets. (CVE-2016-6302)

* Multiple integer overflow flaws were found in the way OpenSSL performed pointer arithmetic. A remote attacker could possibly use these flaws to cause a TLS/SSL server or client using OpenSSL to crash. (CVE-2016-2177)

* An out of bounds read flaw was found in the way OpenSSL formatted Public Key Infrastructure Time-Stamp Protocol data for printing. An attacker could possibly cause an application using OpenSSL to crash if it printed time stamp data from the attacker. (CVE-2016-2180)

* Multiple out of bounds read flaws were found in the way OpenSSL handled certain TLS/SSL protocol handshake messages. A remote attacker could possibly use these flaws to crash a TLS/SSL server or client using OpenSSL. (CVE-2016-6306)

Red Hat would like to thank the OpenSSL project for reporting CVE-2016-6304 and CVE-2016-6306 and OpenVPN for reporting CVE-2016-2183. Upstream acknowledges Shi Lei (Gear Team of Qihoo 360 Inc.) as the original reporter of CVE-2016-6304 and CVE-2016-6306; and Karthikeyan Bhargavan (Inria) and Gaetan Leurent (Inria) as the original reporters of CVE-2016-2183.

This update for openssl fixes the following issues :

OpenSSL Security Advisory [22 Sep 2016] (bsc#999665)

Severity: High

  - OCSP Status Request extension unbounded memory growth     (CVE-2016-6304) (bsc#999666)

Severity: Low

  - Pointer arithmetic undefined behaviour (CVE-2016-2177)     (bsc#982575)

  - Constant time flag not preserved in DSA signing     (CVE-2016-2178) (bsc#983249)

  - DTLS buffered message DoS (CVE-2016-2179) (bsc#994844)

  - OOB read in TS_OBJ_print_bio() (CVE-2016-2180)     (bsc#990419)

  - DTLS replay protection DoS (CVE-2016-2181) (bsc#994749)

  - OOB write in BN_bn2dec() (CVE-2016-2182) (bsc#993819)

  - Birthday attack against 64-bit block ciphers (SWEET32)     (CVE-2016-2183) (bsc#995359)

  - Malformed SHA512 ticket DoS (CVE-2016-6302) (bsc#995324)

  - OOB write in MDC2_Update() (CVE-2016-6303) (bsc#995377)

  - Certificate message OOB reads (CVE-2016-6306)     (bsc#999668)

More information can be found on:
https://www.openssl.org/news/secadv/20160922.txt

Also following bugs were fixed :

  - update expired S/MIME certs (bsc#979475)

  - improve s390x performance (bsc#982745)

  - allow >= 64GB AESGCM transfers (bsc#988591)

  - fix crash in print_notice (bsc#998190)

  - resume reading from /dev/urandom when interrupted by a     signal (bsc#995075)

This update was imported from the SUSE:SLE-12-SP1:Update update project.

This update for compat-openssl098 fixes the following issues: OpenSSL Security Advisory [22 Sep 2016] (bsc#999665) Severity: High

  - OCSP Status Request extension unbounded memory growth     (CVE-2016-6304) (bsc#999666) Severity: Low

  - Pointer arithmetic undefined behaviour (CVE-2016-2177)     (bsc#982575)

  - Constant time flag not preserved in DSA signing     (CVE-2016-2178) (bsc#983249)

  - DTLS buffered message DoS (CVE-2016-2179) (bsc#994844)

  - DTLS replay protection DoS (CVE-2016-2181) (bsc#994749)

  - OOB write in BN_bn2dec() (CVE-2016-2182) (bsc#993819)

  - Birthday attack against 64-bit block ciphers (SWEET32)     (CVE-2016-2183) (bsc#995359)

  - Malformed SHA512 ticket DoS (CVE-2016-6302) (bsc#995324)

  - OOB write in MDC2_Update() (CVE-2016-6303) (bsc#995377)

  - Certificate message OOB reads (CVE-2016-6306)     (bsc#999668) More information can be found on:
    https://www.openssl.org/news/secadv/20160922.txt Bugs     fixed :

  - update expired S/MIME certs (bsc#979475)

  - fix crash in print_notice (bsc#998190)

  - resume reading from /dev/urandom when interrupted by a     signal (bsc#995075)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The version of IBM BigFix Remote Control running on the remote host is prior to 9.1.3. It is, therefore, affected by the multiple vulnerabilities :

  - Multiple integer overflow conditions exist in the     bundled version of OpenSSL in files s3_srvr.c,     ssl_sess.c, and t1_lib.c due to improper use of pointer     arithmetic for heap-buffer boundary checks. An     unauthenticated, remote attacker can exploit this to     cause a denial of service. (CVE-2016-2177)

  - An information disclosure vulnerability exists in the     bundled version of OpenSSL in the dsa_sign_setup()     function in dsa_ossl.c due to a failure to properly     ensure the use of constant-time operations. An     unauthenticated, remote attacker can exploit this, via a     timing side-channel attack, to disclose DSA key     information. (CVE-2016-2178)

  - A vulnerability exists, known as SWEET32, in the bundled     version of OpenSSL in the 3DES and Blowfish algorithms     due to the use of weak 64-bit block ciphers by default.
    A man-in-the-middle attacker who has sufficient     resources can exploit this vulnerability, via a     'birthday' attack, to detect a collision that leaks the     XOR between the fixed secret and a known plaintext,     allowing the disclosure of the secret text, such as     secure HTTPS cookies, and possibly resulting in the     hijacking of an authenticated session. (CVE-2016-2183)

  - An information disclosure vulnerability exists due to     the inclusion of sensitive information in error logs. An     authenticated, remote attacker can exploit this to     disclose information. (CVE-2016-2928)

  - An information disclosure vulnerability exists due to     the transmission of information in cleartext. A     man-in-the-middle attacker can exploit this to disclose     sensitive information. (CVE-2016-2931)

  - An unspecified flaw exists that allows an     unauthenticated, remote attacker to inject arbitrary XML     content. (CVE-2016-2932)

  - An information disclosure vulnerability exists due to a     flaw that allows traversing outside of a restricted     path. An authenticated, remote attacker can exploit     this, via a specially crafted request, to disclose     arbitrary files. (CVE-2016-2933)

  - A cross-site scripting (XSS) vulnerability exists due to     improper validation of user-supplied input. An     unauthenticated, remote attacker can exploit this, via a     specially crafted request, to execute arbitrary script     code in a user's browser session. (CVE-2016-2934)

  - An unspecified flaw exists that allows an     unauthenticated, remote attacker to submit invalid HTTP     requests, resulting in a denial of service condition for     the broker application. (CVE-2016-2935)

  - An information disclosure vulnerability exists due to     the storage of information in log files in plaintext. A     local attacker can exploit this to disclose sensitive     information. (CVE-2016-2943)

  - A flaw exists in the bundled version of OpenSSL in the     ssl_parse_clienthello_tlsext() function in t1_lib.c due     to improper handling of overly large OCSP Status Request     extensions from clients. An unauthenticated, remote     attacker can exploit this, via large OCSP Status Request     extensions, to exhaust memory resources, resulting in a     denial of service condition. (CVE-2016-6304)

  - An out-of-bounds read error exists the bundled version     of OpenSSL in the certificate parser that allows an     unauthenticated, remote attacker to cause a denial of     service via crafted certificate operations.
    (CVE-2016-6306)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to its banner, the version of OpenSSL on the remote host is 1.0.1 prior to 1.0.1u, or 1.0.2 prior to 1.0.2i.  It is therefore affected by the following vulnerabilities :

 - A flaw exists in 'ssl/s3_srvr.c', 'ssl/ssl_sess.c', and 'ssl/t1_lib.c' that may under certain circumstances lead to integer overflows and allow an attacker to have an unspecified impact. (CVE-2016-2177)
 - A flaw exists in 'crypto/dsa/dsa_ossl.c' that is triggered as the DSA signing algorithm does not properly run in constant time.  This may potentially allow a context-dependent attacker to conduct e.g. a side channel attack and gain unauthorized access to DSA key information. (CVE-2016-2178)
 - A flaw exists that is due to the system not handling fragmented DTLS buffered messages correctly.  There are two scenarios where messages could result in the queue not being cleared and memory not being freed.  The first occurs when a full message is received after a fragment of the same message, and the system uses the full message while ignoring the fragmented message without removing it from queue.  The second occurs when a peer sends a 'future' message with extraneous packets containing a sequence number higher than the Finished message, resulting in the packets not being removed from queue.  With a saturation of either type of message, a remote attacker can exhaust up to 1500k of memory per connection, exhausting memory leading to a remote denial of service. (CVE-2016-2179)
 - An out-of-bounds read flaw exists in the 'TS_OBJ_print_bio()' function in 'crypto/ts/ts_lib.c'.  This may allow a context-dependent attacker to have an unspecified impact that may potentially include crashing a process linked against the library or disclosing memory contents. (CVE-2016-2180)
 - A flaw exists in the DTLS implementation that is triggered when handling epoch sequence numbers in records.  This may allow a remote attacker to cause legitimate packets to be dropped. (CVE-2016-2181)
 - An overflow condition exists in the 'BN_bn2dec()' function in 'crypto/bn/bn_print.c'.  The issue is triggered as certain input is not properly validated when handling BIGNUM values. This may allow a context-dependent attacker to cause a buffer overflow, resulting in a denial of service in a process linked against the library. (CVE-2016-2182)
 - A flaw exists in the 'tls_decrypt_ticket()' function in 'ssl/t1_lib.c' that is triggered during the handling of ticket HMAC digest.  This may allow a remote attacker to crash the service. (CVE-2016-6302)
 - An overflow condition exists in the 'MDC2_Update()' function in 'crypto/mdc2/mdc2dgst.c' that is triggered as certain input is not properly validated.  This may allow a context-dependent attacker to cause a heap-based buffer overflow, crashing a process linked against the library or potentially allowing the execution of arbitrary code. (CVE-2016-6303)
 - A flaw exists in the 'ssl_parse_clienthello_tlsext()' function in 'ssl/t1_lib.c' that is triggered when handling overly large OCSP Status Request extensions from clients.  This may allow a remote attacker to exhaust available memory in a process linked against the library. (CVE-2016-6304)
 - An out-of-bounds read flaw exists that is triggered when handling client certificate, client certificate request, and server certificate messages.  This may allow a remote attacker to potentially crash a process linked against the library. (CVE-2016-6306)

The dsa_sign_setup function in crypto/dsa/dsa_ossl.c in OpenSSL through 1.0.2h does not properly ensure the use of constant-time operations, which makes it easier for local users to discover a DSA private key via a timing side-channel attack.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

ID	Name	Product	Family	Published	Updated	Severity
93674	FreeBSD : OpenSSL -- multiple vulnerabilities (43eaa656-80bc-11e6-bf52-b499baebfeaf)	Nessus	FreeBSD Local Security Checks	9/23/2016	1/4/2021	critical
107067	Arista Networks EOS 4.17 Multiple Vulnerabilities (SA0024) (SWEET32)	Nessus	Misc.	2/28/2018	3/13/2020	high
93690	Debian DLA-637-1 : openssl security update	Nessus	Debian Local Security Checks	9/26/2016	1/11/2021	critical
93777	CentOS 6 / 7 : openssl (CESA-2016:1940)	Nessus	CentOS Local Security Checks	9/28/2016	1/4/2021	critical
93783	openSUSE Security Update : openssl (openSUSE-2016-1134)	Nessus	SuSE Local Security Checks	9/28/2016	1/19/2021	critical
93909	SUSE SLED12 / SLES12 Security Update : compat-openssl098 (SUSE-SU-2016:2468-1)	Nessus	SuSE Local Security Checks	10/7/2016	1/6/2021	critical
96145	IBM BigFix Remote Control < 9.1.3 Multiple Vulnerabilities (SWEET32)	Nessus	CGI abuses	12/27/2016	11/13/2019	critical
9625	OpenSSL 1.0.1 < 1.0.1u / 1.0.2 < 1.0.2i Multiple Vulnerabilities	Nessus Network Monitor	Web Servers	10/6/2016	3/6/2019	high
503114	Siemens SCALANCE X-200RNA Switch Devices Observable Discrepancy (CVE-2016-2178)	Tenable OT Security	Tenable.ot	3/13/2025	3/13/2025	medium

Detections

Analytics

Plugins Search

critical

high

critical

critical

critical

critical

critical

high

medium